Perhaps you should try some spelling variations:
"procesos penales statistical methods." » "procesos problems statistical methods.", "procesos health statistical methods.", "procesos sciences statistical methods.", "proceso penal statistical methods.", "procesos contables statistical methods.", "procesos sociales statistical methods."
"proceso control statistical methods." » "process control statistical methods.", "proceso contra statistical methods.", "proceso contralos statistical methods."

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("proceso control statistical methods.") OR ("procesos penales statistical methods."))~.
• Removing quotes may allow a broader search: (( proceso control statistical methods. ) or ( procesos penales statistical methods. ))~.
• Adding a wildcard symbol may retrieve word variants: (("proceso control statistical methods.") or ("procesos penales statistical methods."))*.